Trump arrives at NATO summit as Iran rift looms above alliance talks

President Donald Trump is arriving at the Turkey-held NATO summit with fresh frustration toward several European allies for their responses to the U.S.-led operations against Iran, opening a new front in his long-running campaign to pressure the alliance over burden-sharing. The summit, which takes place Tuesday and Wednesday in Ankara, Turkey, is expected to focus on defense spending, Ukraine and NATO's long-term strategy toward Russia. But it will bring Trump face to face with some of his bigg